膨润土吸附剂制备工艺及吸附性影响因素研究

发布时间：2018-05-29 15:41

  本文选题：酸性矿山废水 + 重金属离子　； 参考：《非金属矿》2017年05期

【摘要】：针对矿山废水酸度高、重金属离子处理成本过高的问题,采用膨润土、钢渣复合颗粒吸附重金属离子,从去除率、质量散失率、碱度释放量对复合颗粒制备工艺进行探讨,并研究其吸附性能影响因素,用此颗粒处理模拟酸性矿山废水(AMD)。结果表明:膨润土、钢渣配比5∶5,Na_2CO_3用量5%,焙烧粒径2 mm,500℃下焙烧60 min,吸附剂投放量10.5 g/L,反应时间240 min,振荡速率100 r/min,反应温度25℃,对Fe~(2+)、Mn~(2+)、Cu~(2+)、Zn~(2+)去除率分别为98.84%、94.93%、99.26%、96.85%,出水pH值为8.42,该复合颗粒既能去除重金属离子又能降低AMD酸度,是一种高效、环保、经济的AMD处理吸附剂。
[Abstract]:In view of the problems of high acidity and high cost of heavy metal ion treatment in mine wastewater, bentonite and steel slag composite particles were used to adsorb heavy metal ions. The preparation process of composite particles was discussed from removal rate, mass loss rate and alkalinity release. The influence factors of adsorbability were studied, and this particle was used to treat the simulated acid mine wastewater. The results showed that the ratio of bentonite and steel slag was 5: 5 (NaCO3), the amount of bentonite and steel slag was 5: 5, the roasting diameter was 2 mm / 500 鈩，

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